Electric steam generator



Sept. 14 1926.

J. H. REED BLECTRIF5QBAU GENERATOR Filed 00tv, 1924' 2 Sheets-Sheet 1 844mm toz E Jurws J ,Real

Sept. 14,1926. 1,599,544

J. H. REED ELECTRIC STEAM GENERATOR Filed Oct. '7, 1924 2 Sheets-Sheet 2 ihmeo' R Patented Sept. 14, 1926.

UNITED STATES JAMES HARTLEY REED, OF DETROIT, MICHIGAN.

ELECTRIC STEAM GENERATOR.

Application filed October 7, 1924. Serial No. 742.199.

Genericallythis invention relates to steam boilers, but it more especially comprehends the type in which steam is generated by electrical current.

One object of this invention is to provide a boiler unit of this type of simplified construction so designed as to be efliciently and economically operated.

Another object of this invention is to pro-- vide an electric steam boiler embodying a plurality of interconnected water tubes having a common steam reservoir. 2

A further important object of this invention is to provide novel means for housing and supporting electric heating elements within the water tubes.

A. still further object of this invention the provision of simplified means for bold ing and insulating the heating elements.

\Vith these and other objects in view, which will become apparent as the description proceeds, the invention resides in the construction, combination and arrang nent of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which like characters of reference indicate like parts'throughout the several figures, of which Fig. 1 is across section of my improved 30 electric steam boiler;

Fig. 2 is a top plan view of the water tubes showing the heating element and casing in dotted outline, the end closures and heating element supporting means on two of the tubes in operative position, and with the end plates and heating element sup ports detached from one of the tubes, and showing the circuits to the heating elements; and

Fig. 3 is a detailed view of the heating bar, bar casing, front and rear end plates, and modified formof heating element or coil.

Fig. l is a face view of front and rear end plates and 25, respectively.

I am aware that many attempts have been made to perfect electric steam generators, but for the most'part they have, owing to a multiplicity of parts, non-economical heating structures and for other reasons, proven more or less unsatisfactory, and it was to overome such deficiencies and to provide an electrical steam generator, simple in construction, comprising few parts, embodying heating units comprising novel supporting means and economically operated, that I designed the boiler structure forming the subject matter of this invention.

in the illustrated embodiment characterizing this invention there is shown a supporting frame 1 the upper end of which terminates in a plurality of U-shaped sup porting members 2 adanted to be placed under each end of the parallelly extending sp ced ater tubes 3. The said tubes 3 are connected by a plurality of spreader or cross tubes'at so that water may freely circulate between the said tubes Projecting upwardly from water tubes 3 a plurality of outlet or steam tubes 5 .g into and forming a support for a steam dome or reservoir 6 positioned ab re the water tubes 3 and in vertically spaced parallelism with respect to the center tube The front ends of water tubes 3 are externally tl'ireaded as at 7 to engage the in ternal threads 8 of flanges 9 integrally formed on end plates 10 which are formed with integral outwardly extending flanges ll of smaller diameter than the said plates 10 and internally threaded to engage the external threads of the packing nuts 12 as at 13, the said nuts 12 are formed with in tegral flanges 14 adapted to seat against the flanges 11 to limit the inward or tight ening movement of the said nuts against the packing 15, for a purpose which will hereinafter more fully appear.

The heating element casings 16 are adapt-- ed to extend through the tubes 8 and beyond the front ends thereof, through end plates 10 as at 17 and partially within packing nuts 12 as at 18. The porcelain collar 19 is adapted to threadedly cng ge the packing nuts 12 as at 20 and to rece e, support and insulate the reduced end 21 of heating element 22 extending through and housed by casing 16, thereby insulating and forming a closure for said casing.

The rear ends of water tubes 3 are externally threaded to engage the interior threads 23 of flanges 2st integrally formed on rear end plates 25, which is also formed with an integral outstanding flange 26 externally threaded as at 27' to engage the interior threads 28 of 16 to support and form a waterseal connection therewith. A porcelain collar or insulating member 29 is adapted to seat within and form a lining for the flanged portion 26, and is primarily designed to receive, support and insulate the rear end of the heating element or bar til) ol her t ed.

oi heating the Water in the m y. from the gen- .r or other ..llijt a e ot power G is led into the has line 3l-fl3 tr in which it let through the heating elements or resistan ill 31. 32-32. and E2 $133 to he return lius line ll) U and thence heel;

1h souice of mere? or generator 4%. The heating niednnns or resistances convert the eleartrical enere' 1:0 hert which it F4 is transferred t lli'illflli the casinos in to cue Water in the te 3 and the resultant steam vapor is conducted through the tithes 5 :Yoir or doine (3 for utilization as desired. is thought that the operation of the device is cl air from tae ahore descripand that further explanation is unnec- Lll practice, I have tour of my inreution illustrate panting above dc i is the most etlicient and p 'acticin yet i C the conditions concurrent with the ntion of my device will necessaril vary,

t l in the I desire to emphasize that various minor changes in details of construction, proportion and arrangement of parts, may be resorted to Within the scope of the appended claims without. deiarting from or sacriticin o; any of theprinciples of my invention.

Having thus described my intention, and without enumerating, Variations and equivaients what I d sire protected by Letters Patent is as set forth in the following" claini In an electrically heated hoiler, the coinhiaation, with a pluralita of spaced parallel Water tubes in the same longitudinal plant; a plurality of pipes interconnecting said tuhes a reservoir centrally and vertically spaced with respect to said tubes. a plurality of outlet: pipes connecting said tubes with said reservoir, a heating element extwadin through each of said tubes and he- \'Ull l one end thereot comprising;- a 'asing and res ;tance medium, a closure assembly "1 one end of ea "11 tuhe comprisin an end nlate having a tlange at right angles thereto t le -1 diameter than said plate. a packing i pied to engage said flange and a sup- 1 engaging said packing nut for r and pportiug said heating elea closure tor the other end of each of tubes comprising an end plate torined said with an outstanding cylindrical projection adapted to receive, support and insulate the other end oi said heating element, and mean, transmitting electric current to the heatingmedium.

JAMES HARTLEY REED. 

